A motor boat can travel 30km upstream and 28 km downstream in 7 hours. it can travel 21 km upstream and return in 5 hours. find the speed of boat in still water and speed of the stream.
A motor boat can travel 30km upstream and 28 km downstream in 7 hours. it can travel 21 km upstream and return in 5 hours. find the speed of boat in still water and speed of the stream.
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